Question 1090974
The % gain ( or loss ) is:
{{{ (( p - c ) / c)*100 }}} where
{{{ p }}} = selling price
{{{ c }}} = cost
( for a certain numberof items )
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For convienence, I will say that the cost
price of 11 shirts is $110.
That means the cost of 10 shirts is
{{{ (10/11)*110 = 100 }}}
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The selling price of 10 shirts is $110
( the cost of 11 shirts )
Plug into formula:
{{{ ( 110 - 100 ) / 100 = 10/100 }}}
{{{ ( 10/100 )*100 = 10 }}}
10% gain